Destructuring

Destructuring

Easily extract array elements or object properties and store them in variables

Array Destructuring

[a, b] = ['Hello', ‘Max’]
console.log(a) // Hello
console.log(b) //Max

Object Destructuring

{name} = {name:'Max', age: 28}
console.log(name) //Max
console.log(age) // undefined

const numbers = [1, 2, 3]

[num1, num2] = numbers;

console.log(num1, num2)

Reference and Primitive Types Referesher

const number = 1; //Primitive
const num2 = number; //It will copy the value

Objects and array are reference type:

const person = {
name: 'Max'
};

const secondPerson = Person;
person.name = 'Manu';

console.log(secondPerson);

To real copy use spread

const person = {
name: 'Max'
};

const secondPerson = {
...person

};
person.name = 'Manu';

console.log(secondPerson);

Refereshing Array Functions

const numbers = [1, 2, 3]

const doubleNumArray = numbers.map((num)=> { return num * 2;});

console.log(numbers);
console.log(doubleNumArray);